Solved strange problem. Reason: a strange bug?

Question

Hi,
recently I had a really strange problem, where I could not work with the enhanced classes from within a web application (but from the dos-prompt, see my prosting "Kodo says classes are not enhanced ..."). Everybody suggested it was a classpath problem, what I also
thought was the most sensible reason, but all I tried with the classpath didn't seem to work. What I really didn't understand was that it worked before once. I couldn't think of anything that I changed, but now I tried something unreasonable, and it seems to be the reason for
the problem. What I did was, that in the early stages of my application (when everything was still alright) I used a file package.jdo (in the classes-subdirectory) to enhance the classes. Later I changed to system.jdo in the root-dir of the package hierarchie. Now I went back
to package.jdo, and it worked. But I can't imagine how this might change the behaviour of Kodo? The content of package.jdo / system.jdo is this:
<?xml version="1.0"?>
<jdo>
     <package name="de.mediateam.quizmaster.data">
          <class name="User" />
          <class name="Category">
               <field name="children">
                    <collection element-type="Category" />
               </field>
               <field name="questions">
                    <collection element-type="Question" />
               </field>
          </class>
          <class name="Topic" persistence-capable-superclass="Category" />
          <class name="Test" persistence-capable-superclass="Category">
               <field name="participants">
                    <collection element-type="User" />
               </field>
          </class>
          <class name="Question">
               <field name="prerequisites">
                    <collection element-type="Question" />
               </field>
          </class>
          <class name="Answer" />
     </package>
</jdo>
There is no difference if you remove all classes but the User-class. The problem stays when it is system.jdo.
So is this a bug with Kodo, or did I miss something in the documentation about differences between package.jdo and system.jdo?
Cheers
Martin

Answer 1

I had system.jdo in the class-hierarchies root directory, but for web-apps this dir (web-context/WEB-INF/classes) doesn't need to be in the classpath. I just tried to copy system.jdo to the same dir as system.prefs and this works.
It might however be helpful in such situations to get a bit more precise error message (not: "The system could not initialize; the following registered persistent types have not been enhanced: [...]").
But thanks for your help. Mysterie solved now.
Martin
On Mon, 10 Sep 2001 17:19:50 -0500, "Abe White" <[email protected]> wrote:
Perhaps system.jdo is not being found by Kodo? system.jdo should be located
in the same place as system.prefs -- at the top level of the CLASSPATH.
package.jdo files, on the other hand, should be placed in the same package
as the classes they contain metadata for. That is the only difference
between the two.
-- Abe White
Kodo Product Team